package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * 分类业务层
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增菜品
     *
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键
        Long id = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开启分页
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        //调用方法查询
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());

    }

    /**
     * 菜品批量删除
     *
     * @param ids
     */
    @Transactional//事务
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断是不是热卖产品
        for (Long id : ids) {
            Dish dish =  dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                //当前菜屏处于热卖不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断如果是套餐内的菜能不能删除
        List<Long> setmealIds = setmealMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds!=null && setmealIds.size()>0){
            //当前菜品是套餐内的菜不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //口味表要一起删
        //删除菜品表中的数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除管理的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO selectById(Long id) {
        //根据id查询菜品数据
        Dish dish= dishMapper.getById(id);

        //根据菜品id查询口味
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到vo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     * @return
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //删除原有口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 修改菜品售卖状态
     * @param id
     */
    @Override
    public void updateStatusById(Integer status,Long id) {
        Dish dish = dishMapper.getById(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<DishVO>  selectBycategoryId(Long categoryId) {
        //根据id查询菜品数据
        List<Dish> dishs= dishMapper.getBycategoryId(categoryId);
        List<DishVO> dishVOS = new ArrayList<>();
        for (Dish dish : dishs) {
            //根据菜品id查询口味
            List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(dish.getId());
            //将查询到的数据封装到vo
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(dish,dishVO);
            dishVO.setFlavors(dishFlavors);
            dishVOS.add(dishVO);
        }
        return dishVOS;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        Long categoryId = dish.getCategoryId();
        List<Dish> dishList = dishMapper.getBycategoryId(categoryId);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
